Author(s)

M.Fujita, L.Hamouda

Abstract

Lumping process of distributed parameter runoff models based on equivalent frequency response method L. Hamouda* & M. Fujita* * Graduate School of Engineering, Department of Applied Hydrology Hokkadio University, Japan. Abstract Equivalent frequency response method (EFRM) was developed to analyze non-linear elements such as threshold and saturation in control engineering. In previous work, Hamouda and Fujita [1], [2] extended the application of EFRM to analyze runoff for non-dimensional St. Venant equation and its related models, e.g. diffusion, kinematic, and gravity models. The equivalent frequency transfer function (EFTF) between the input or precipitation and the output or runoff was derived by the new method. Previous study was restricted to one element such as a slope or channel. In this study, the authors expand the application of EFRM to cover a multi-element structure. EFTF between the precipitation and the runoff from the outlet of the whole drainage basin was derived by the sa

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